Minimum Free Disk Space Update

Also included in our backup updates are our enhancements to the minimum free disk space. New installs of cPanel will check for a minimum 5% of free disk space before allowing backups on your machine by default. Users can adjust the minimum allowance by percentage of space, megabytes, or choose to completely disable this feature altogether.

For backup for big website you buy business package and problem is solved.
If you are making money or use such big website for making money pay also for quality services and you will have it as much as you want.